Self-loading pistol having forwardly extending breech slide

ABSTRACT

A self-loading pistol has a hand grip member which consists entirely of a synthetic resin material into which are embedded metal parts for supporting the breech member and for guiding it during its recoil movement, a trigger assembly, and means for locking a magazine, the trigger assembly being located in a trigger casing formed partly by some of the metal parts. Means are provided which permit easy removal and replacement of the breech member and the barrel, and a buffer device may be provided for lessening the recoil shock of the breech member.

United States Patent Seidelet al.

[451 Oct. 10,1972

[54] SELF-LOADING PISTOL HAVING FORWARDLY EXTENDING BREECH SLIDE [72] Inventors: Alex Seidel; Tilo Miiller, both of Obemdorf Neckar; l-lelmut Weldle,

Beffendorf, all of Germany [73] Assignee: Firms Heckler & Koch GmbH,

Oberndorf, Germany [22] Filed: Sept. 17, 1969' 211 Appl. No.: 858,644

[30] Foreign Application Priority Data Sept. 18, 1968 Germany ..P 17 28 251.8

[52] US. Cl. ..89/196, 42/71 P, 89/198, 89/199 [51] Int. Cl ..lF4lc 23/00, F4ld 11/12 [58] Field of Search ..42/71 P, 75 A, 75 C, 77; 89/199,l95,196,197,198

[56] References Cited UNITED STATES PATENTS 9/1965 Dye ..42/75 C 1,449,566 3/1923 Walther ..89/196 2,522,192 9/1950 Porter ..89/198 2,832,266 4/1958 Sunderland ..89/195 3,027,811 4/1962 Young ..42/69 A 3,323,246 6/1967 Loffler ..89/199 3,343,457 9/ 1967 Menneking et a1. ..89/199 R26,872 4/1970 Dieckmann ..89/195 3,512,290 5/1970 Violette et a1. ..42/75 A Primai'yExdmineiStepPien C. Bentley Attorney-Craig, Antonelli & Hill [5 7] ABSTRACT A self-loading pistol has a hand grip member which consists entirely of a synthetic resin material into which are embedded metal parts for supporting the breech member and for guiding it during its recoil movement, a trigger assembly, and means for locking a magazine, the trigger assembly being located in a trigger casing formed partly by some of the metal parts. Means are provided which permit easy removal and replacement of the breech member and the barrel, and a buffer device may be provided for lessening the recoil shock of the breech member.

14 Claims, 4 Drawing Figures PATENTEDom 10 1972 SHEET 1 [IF 2 izt INVENTORS and HQLMu-r WELDLE ALEX SEIDELI TILO Mo'I-LER SELF-LOADING PISTOL HAVING FORWARDLY EXTENDING BREECH SLIDE This invention relates to a self-loading pistol comprising a hand grip and a breech assembly which is displaceable in its longitudinal direction relatively to the hand grip.

In self-loading pistols known heretofore the grip member consists usually of a wrought steel member which is faced in the region of the hand grip with a grip shell of synthetic resin. The use of such a grip member consisting of steel was considered heretofore to be necessary because the grip member accommodates the barrel and serves for guiding the breech assembly. Universally experts were heretofore of the opinion that the forces occurring therein and the stability necessary for good firing accuracy was attainable only by means of such a grip member consisting of steel. Furthermore, the grip member must also offer the possibility of mounting the trigger assembly and of guiding and accommodating the magazine. Therefore, the high costs were tolerated which occur in the production of such grip member.

The invention is based on the problem to simplify the production of the grip member and to lower the costs connected therewith. This problem is solved according to the invention in that the grip member of the selfloading pistol according to the invention consists completely of a synthetic resin member into which metal parts are pressed or cast which are required for receiving the barrel, mounting the trigger assembly, guiding the breech assembly and locking the magazine.

It is obvious that such a grip member pressed or cast from a synthetic resin is produceable very much more simply and at very much lower costs than a grip member consisting of steel and forged for example in a die. The costs incurred thereby are not considerably higher than the costs which had to be provided heretofore for the production of the grip shells consisting of synthetic resin. Also pressing or casting therein the required metal parts and the production of the latter does not involve very high costs, and in particular these costs are not greater than the costs which were necessary heretofore for machining the grip member. The reduction of costs obtainable by the invention is consequently very considerable.

By the use of a grip member of synthetic resin, neither the life nor the firing accuracy of the pistol are disadvantageously affected, in contrast to the prevailing prejudices generally held by the experts. The firing accuracy of the pistol depends only upon the fact that the breech assembly carrying the sighting device assumes after each shot an exactly defined rest position relatively to the barrel. The defined position of the breech assembly however, can be ensured substantially independently of the construction of the grip member by suitable guide members on the barrel, on the metal part serving for receiving the barrel, and on the breech assembly Also the forces produced during shooting affect on the one hand the barrel and the part holding the barrel and on the other hand the displaceable breech assembly, whereas otherwise the grip member remains unloaded by these forces. Moreover a grip member of synthetic resin is stiffer and less resilient than the hand by which the pistol is held during shooting so that the grip member is loaded only by forces which can be absorbed by the hand.

The result of the above considerations is, that a grip member of synthetic resin can fulfil all the demands which must be made on a grip member, so that the opinion which undeniably prevails amongst experts that the grip member must consist of steel was overcome by the invention and new ways were opened to the art.

In a preferred embodiment of the invention, a trigger casing is disposed above the hand grip of the pistol and is provided with two side parts the lower edges of which are embedded in the grip member and the forward ends of which are connected to each other by a block into which the rear end of the barrel is inserted, and the rearward ends of which are connected to a transverse rail cast therearound. In this manner, an extremely stable frame is provided which is capable of absorbing high loads and which simultaneously can be securely connected to the grip member because substantially the whole periphery of the frame is embedded. At the same time, the advantage is obtained for the production that it is unnecessary to press or cast a plurality of individual parts into the synthetic resin member.

Simple guidance for the breech assembly can be ob tained in a simple manner in that the breech assembly is provided at its forward end with a transverse wall having a passage opening therein for the barrel, and that the breech assembly is guided on the end of the barrel projecting from the block whereas the breech member is provided in the region of its rearward end on the inside with longitudinal grooves in which the ends of the transverse rail projecting beyond the grip member engage as guide projections. In this manner the breech member is thus guided exclusively at the rigid metal frame and the tube, that is to say a constructional unit comprising the barrel, so that on the one hand the above mentioned exactly defined position of the breech member is ensured in relation to the barrel, and the forces occurring during a shot affect only these parts. For this purpose, it is particularly advantageous when the main spring is formed by a coil compression spring disposed concentrically around the barrel and which is supported at the one end by the block and at the other end by the transverse wall of the breech member.

In a preferred embodiment of the invention, the trigger is formed by a plate-shaped slide member which is guided at its upper and its lower edge as well as at its rear section in appropriate recesses in the grip member. The use of such a plate-shaped slide member as trigger has the particular advantage that no bearing points for bearing pins or the like must not be provided in the grip member which would be subjected to a relatively high load and would make the use of pressed in or cast in bearing bushes necessary. Moreover the assembly of such a slide member is particularly simple, because it need only be pushed into the recesses provided. For holding the trigger in the recesses, there may serve for example a known slidable safety means. In order to hold it in its rest position, the trigger may be loaded by a coil compression spring which engages in an opening provided at the rear end of the slide member and is supported on a transverse rail which is inserted behind the slide member in grooves which are provided on the inner sides of the side walls of the grip member. The spring and the transverse rail also are adapted to be inserted simply into the recesses provided for this purpose in the grip member.

The trigger constructed as a plate-shaped slide member can be connected by trigger rods to the trigger assembly mounted in the trigger casing, the trigger rods being guided in longitudinal slots of the side wall of the trigger casing and their forward ends engaging by means of obliquely inwardly and downwardly directed lugs in recesses of the slide member, and their rearward ends being provided with cranked portions projecting into the trigger casing. These trigger rods may be constituted by simple punched parts of sheet metal which can be produced at very low costs and which do not require much space. In particular, they can be easily guided past the sides of the block which receives the rearward end of the barrel.

In a particularly preferred embodiment of the invention, the pistol is provided with a buffer device onto which the breech assembly runs at the end of its backward or recoil movement. This buffer device keeps very hard shocks away from the grip member, which otherwise could be produced when the breech assembly impinges in its hindmost position, and also permits the use of the invention in pistols of large caliber and in pistols with a continuous firing device. For pistols with a continuous firing device, the additional particular advantage is attained that the pistol can be held better in aim because the hardness of the recoil shock is reduced.

The buffer device may preferably be assembled below the barrel in the block accommodating the barrel so that the breech assembly runs against the buffer device by the rear side of its forward transverse wall. This arrangement has the advantage that the buffer device does not require valuable space and moreover is inserted into a part which must in any case be extremely solid for receiving the barrel. Thus, in a preferred embodiment of the invention, the block is provided below the barrel with a forwardly open bore into which a spring system, preferably a spring system provided with brake rings, is inserted on which a buffer member is supported which is held by a screw ring and which extends through the screw ring.

In a further embodiment of the invention protection of the breech assembly against release from the grip member can be obtained in that a slider which is displaceable perpendicularly to the barrel and which is provided with an abutment, is disposed at the front end of the block, the recoiling breech assembly impinging on the abutment which is movable out of the path of the breech assembly by means of the slider so that the breech assembly can be displaced beyond its hindmost operating position to such extent that the guide grooves provided at the rear end of the breech assembly are disengaged from guide projections provided at the grip member. This arrangement has the advantage that the members needed therefor are fixed to the block and therefore need not be separately connected to the grip member. Moreover the grip member is not additionally loaded by these members. In this case the slider is preferably disposed above the trigger aperture of the grip member and can be pulled into the trigger aperture out of its operative position in which its lower end which is provided with a hammer-like head extending over the whole width of the grip member is flush with the underside of the grip member limiting the trigger aperture. The hammer-like head permits a good grip of the slider to be obtained without members of any kind being present on the outside of the grip member in a disturbing manner.

When the slider has been pulled down so that the breech assembly can be moved into a position in which it can be released from the grip member, the slider projects disturbingly into the trigger aperture of the grip member surrounded by the trigger loop whereby an indication is given that the pistol is not ready for firing. Moreover, the slider can be provided on its rear side with undercut projections which engage fittingly into corresponding recesses on the trigger when the slider is moved out of its operative position. The trigger is detained in this manner in its rest position and can then be actuated only when the slider is located in its operative position and thus the firearm is in a state ready for firing. The operative reliability of the firearm is significantly increased in this way. The slider may be held in its operative position by a detent device which is formed by a spring-loaded detent member disposed in the block and a corresponding recess on the inside of the slider.

When the pistol according to the embodiment described above is provided with a buffer device, the abutment disposed on the slider is formed by a plunger which is displaceably mounted in the slider and the inner end of which rests against the buffer disposed in the block and thereby transmits to the buffer and the spring arrangement supporting the buffer, the forces occurring when the recoiling breech assembly is intercepted. For the case that also in such an embodiment of the pistol a detent device for the slider is provided the detent member is preferably disposed in the buffer and the recess is disposed in the plunger.

Further details and constructional features of the invention will be apparent from the following description, in which the invention is described and explained in detail with reference to the embodiment illustrated in the accompanying drawings. The features which can be found in the description and the drawings may be utilized in other embodiments of the invention individually by themselves or severally in any combination. In the drawings:

FIG. 1 is a side view of the grip member of a pistol according to the invention with the barrel inserted therein,

FIG. 2 is a section on the line II-II through the grip member according to FIG. 1,

FIG. 3 is a longitudinal section through the upper part of a pistol with a grip member according to FIG. 1, and

FIG. 4 illustrates the breech assembly of the pistol according to FIG. 1, partly in a view from below and partly in section.

A grip member 1 of a pistol illustrated in the drawings by way of example, consists completely of a synthetic resin material and is provided only on its upper side with metal parts 2 to 6 which have been pressed or cast into the grip member during the production thereof, The terms pressing and casting used herein are to comprise all suitable methods for forming the moulded part of synthetic resin which constitutes the grip member 1.

The metal parts 2 to 5 just referred to form a stable frame which is limited by two lateral wall parts 3 and 4 of sheet metal which are connected to each other at their forward end by a metal block 2 and at their rearward end by a transverse rail 5. Furthermore a guide member 6 is attached to the transverse rail 5 and serves in a manner not illustrated in detail for the purpose of attaching the pistol to the front end of a shoulder support. The lower section of the block 2 and the lower edges of the lateral wall parts 3 and 4 are embedded in the synthetic resin material of the grip member 1 which is provided with an upper edge 7 which extends in a straight line substantially along its whole length, which however is provided at its rear end with an upwardly directed section 8 in which the whole guide member 6 and a major portion of the transverse rail 5, are embedded. The ends of the transverse rail 5 project beyond the lateral wall parts 3 and 4 of the frame and form guide projections 9 for the breech assembly 10 of the firearm illustrated in FIGS. 3 and 4.

As may be seen from FIG. 4 the breech assembly 10 is provided at its rearward region with guide grooves 11 in its inner sides, into which the guide projections 9 engage. The forward end of the breech assembly 10 is guided on the forward part of the barrel 12 which is inserted into the block 2. For this purpose the breech assembly 10 is provided at its forward end with a transverse wall 13 which is provided with a passage opening 14 for the forward end of the barrel 12. A main spring 15 of the pistol is disposed concentrically around the barrel 12 and is supported at one end by the front face of the block 2 and at the other end by the inner face of the transverse wall 13 of the breech assembly 10.

The frame including the lateral wall parts 3 and 4 forms simultaneously the trigger casing of the pistol and is disposed in the region above the hand grip of the grip member 1. A trigger assembly 16 is disposed in this trigger casing, but as it does not form the subject of the invention it is not explained in detail; the assembly is connected to a trigger 17 disposed in the grip member 1 by means of two trigger rods 18 and 19 which are guided for a major part of their length in longitudinal slots 20 and 21 of the lateral wall parts 3 and 4. The trigger 17 is constituted by a plate-like slide member the lower edge of which engages into a corresponding groove 22 and the upper edge and rearward part of which engage into a corresponding recess 23 of the grip member 1. The connection between the trigger 17 and the trigger rods 18 and 19 is produced by means of lugs 24 and 25 which project obliquely downwardly and inwardly from the forward ends of the trigger rods 18 and 19, extend past the outer surface of the block 2 and engage into corresponding recesses of the trigger 17. The rear ends 26 and 27 of the trigger rods 18 and 19 are cranked inwardly and are guided by means of longitudinal slots 28 on pins 29 inserted into the lateral wall parts 3. The trigger 17 is held in its rest position by a coil compression spring 30 one end of which engages in a recess 31 at the rear end of the trigger l7 and the other end of which is supported by a collar 32 of a guide pin 33 which in turn is inserted into a transverse rail 34. The ends of the transverse rail 34 engage in grooves 35 which are provided at mutually oppositely disposed locations of the inner walls of the hollow grip member 1 and which are limited by rails 36. For securing the firearm a known slide safety catch 37 is provided which extends through corresponding recesses in the grip member 1 and a keyhole-shaped recess 38 in the trigger 17.

The pistol illustrated by way of example is furthermore provided with a buffer device which serves to intercept the recoiling breech member at the end of its recoil movement and to prevent the breech member from impinging hard on parts of the grip member 1 or metal parts connected thereto. For this purpose a spring arrangement is accommodated in a bore 41 of the block 2 receiving the barrel 12, the bore being located below the barrel and open forwardly, and the spring arrangements comprising three coil compression springs 42, 43 and 44 which are concentrically disposed relatively to each other and which are supported on the bottom of the bore 41; the forward ends of the springs rest against a plate 45 inserted into the bore 41. In front of this plate there is located a further coil compression spring 46 into the windings of which brake rings 47 are inserted the peripheries of which rest against the inside of the bore 41. A cylindrical buffer member 48 is disposed concentrically with the spring 46 and the brake rings 47 it rests by a collar 49 against the forward end of the coil compression spring 46 and is held in the opening 41 by means of a screw ring 50 into which extends the forward end of the buffer member 48. The collar 49 is disposed at such a spacing from the forward end of the buffer member 48 that the front face of the buffer member finishes flush with the screw ring 50 and the front face of the block 2.

Furthermore, a slider member 51 is disposed at the forward end of the block 2 between inwardly cranked rails 52 which are located at the forward end of the block 2, and is mounted for displacement perpendicular to the barrel. The slider member 51 extends in its operative position close to the underside of the barrel l2 and terminates at its other end flush with the underside of the grip member 1 which limits the trigger aperture 53. At its lower end the slider member is provided with a head 54 which is enlarged like a hammer and which extends over the whole width of the grip member 1 so that it can be gripped well from both sides for removing the slider member from the grip member. A plunger 55 is displaceably mounted in the slider member and is located in the operative position of the slider member in the extension of the buffer member 48 and at the same time in the path of a lower edge 56 of the forward transverse wall 13 of the breech member 2. The slider member 51 with the plunger 55 is held in the operative position by a detent device which is formed by a spring-loaded detent pin 57 mounted in the buffer member 48 and an opening 58 provided in the rear face of the plunger 55. It is clear that when the breech member 10 runs back after firing a shot the lower edge 56 of the forward transverse wall 13 impinges on the plunger 55 which transmits the movement of the breech member to the resilient buffer member 48. Initially only the helical compression spring 46 and the brake rings 47 affect the buffer member 48 and decelerate the breech member 2, but eventually the rear face of the buffer member 48 comes into engage ment with the plate 45 and displaces the latter against the force of the springs 42, 43 and 44 during the further rearward movement. Thereby the resistance opposing the rearward movement of the breech member 10 is increased while the brake rings 47 maintain their full effeet so that good damping of the movement is obtained. In this manner it is possible to reduce progressively the peak forces which occur during shooting and are caused by the recoil shock, so that shooting with the pistol according to the invention is much more agreeable, increased firing accuracy is obtained and the pistol can be held better on target during continuous firing. Furthermore, the pistol is suitable for shooting cartridges of large calibers. In many cases it may even be sufficient to use a single continuous spring provided with brake rings in place of the two springs 44 and 46 and to omit the plate 45.

The disposition of the slider member 51 with the plunger 55 in front of the end face of the block 2 with the buffer device has the purpose to permit simple removal of the breech member from the grip member 1. While in using the pistol the return path of the breech is limited by abutment against the plunger 55, the slider member permits the plunger 55 to be withdrawn from the path of the lower edge 56 of the end face 13 of the breech member 10, and thereby enables the breech member 10 to perform a movement beyond its normal end position. When the slider member 51 is pulled down into the range of the trigger aperture 53 by means of the hammer-shaped head 54, the plunger 55 enters into a corresponding recess 59 of the grip member 1. The breech member 10 can then be pushed manually against the force of the closing spring in a rearward direction past the plunger 55 to such extent that recesses 60 which connect the guide grooves 11 disposed at the rearward end of the breech member 10 to the edge of the breech member 2, travel into the region of the guide projections 9 and the breech member 10 can be lifted upwardly off the guide projections. The breech member 10 can then be lifted off the barrel 12 of the firearm in a forward direction. Conversely the breech member 10 can be attached to the grip member 1 by simply pushing the breech member 10 upon the forward end of the barrel 12 and introducing the projections 9 into the recesses 60 and the guide grooves 11. The pistol is ready for use again when, after replacement of the breech member 10, the slider member 51 is returned into its starting position in which the plunger 55 limits the path of the breech member 10.

In order that a shot cannot be fired without the slider member 51 and the plunger 55 having been returned to their operative positions, the slider member 51 is provided at its side adjacent to the block 2 with a recess 61 into which projects the forward end 62 of the trigger 17. The recess 61 is provided at its inside with projections 63 which engage in grooves provided at the outer sides of the forward end 62 of the trigger 17 when the slider member 51 is not located in its operative position. Therefore as long as the slider member 51 has not been pushed back into its operative position it is in engagement with the trigger 17 and prevents actuation of the trigger. It is therefore impossible that a shot can be fired and thereby the breech member 10 is released from the grip member 1 because it runs back into a position in which the guide projections 9 can move out of the guide grooves 11.

It is understood that the invention is not limited to the embodiment illustrated by way of example, but that modifications thereof are possible without the scope of the invention being exceeded. In particular the invention is independent of the trigger system selected and it is also possible to construct pistols according to the invention without a buffer device, although the buffer device in conjunction with the special kind of guidance of the breech member is particularly suited for pistols which are provided with a grip member consisting exclusively of synthetic resin.

Furthermore, it is understood that in the grip part of the grip member 1, the guides required for inserting a magazine and at the lower end of the hand grip a spring-loaded or resilient latch for detaining the magazine are provided. This latch may be mounted for example on a pin pushed into the grip member. For this purpose, a sufficient number of constructions are known so that an illustration and description of the magazine holding device can be omitted.

Furthermore, it may be mentioned that an ejector and an ejection opening for empty cartridge shells may be attached to the breech member 10 in a conventional manner, while the ejector may be formed by a lip which may be bent away from a wall part of the frame. If the grip member of the pistol is provided at its rear end with a guide member for attachment to a shoulder support, a second guide member may be provided at the lower end of the hand grip of the grip member 1.

What we claim is:

1. A self-loading pistol comprising: a barrel, frame means, and a breech block slidably mounted on said frame means for displacement in the longitudinal direction with respect to said frame means, said frame means consisting of a frame support member constructed entirely of synthetic resinous material and metal parts cast into said frame support member, part of said frame support member forming a pistol hand grip extending downwardly from the rear portion of the pistol; said metal parts including two longitudinally extending wall sections spaced from one another to form part of a trigger box assembly therebetween, said wall sections having lower rims cast into the frame support member at a position adjacent the top part of the hand grip member, a block member joining the respective forward ends of said wall sections, and a transverse crossweb joining the respective rearward ends of said wall sections together, said block member having an opening formed therein for supporting the rear end of the barrel and having a lower portion cast into the frame support member, said frame support member including an upwardly extending section and said crossweb including portions extending transversely beyond the outer surface of the upwardly extending section of the frame support member to form guides for guiding the sliding movement of the breech member.

2. A self-loading pistol according to claim 1, characterized in that the breech block has a transverse wall at its front end and longitudinally extending grooves adjacent its rear end, said breech block being guided at its front end by way of said transverse wall cooperating with the barrel and at its rear end by way of said longitudinal grooves cooperating with the guides formed on the crossweb.

3. A pistol according to claim 1, further comprising a trigger formed by a plate-shaped slide member which is guided at its upper and at its lower edge as well as at its rearward section in corresponding recesses of the frame support member.

4. A pistol according to claim 3, wherein the trigger is. loaded by a coil compression spring which engages in a recess disposed at the rear end of the trigger and is supported on a transverse rail which is inserted behind the trigger in grooves provided at the inside of the frame support member.

5. A pistol according to claim 4, wherein the trigger is connectible to a trigger assembly mounted in the trigger casing by means of trigger rods which are guided in longitudinal slots of the lateral wall parts of a trigger casing, the forward ends of said trigger rods engaging in recesses of the trigger by means of inwardly and downwardly directed lugs, and the rearward ends of said trigger rods being provided with cranked sections which project into the trigger casing.

6. A pistol according to claim 1, wherein a buffer device is provided onto which the breech block runs at the end of its recoil movement.

7. A pistol according to claim 6, wherein the buffer device is disposed below the barrel and located in the block member receiving the barrel, and wherein the rear face of a forward transverse wall of the breech block runs against the buffer device during the recoil movement of the breech block.

8. A self-loading pistol comprising a barrel, frame means, a breech block slidably mounted on said frame means for displacement in the longitudinal direction with respect to said frame means, and a buffer device for buffering the recoil movement of the breech block, said frame means consisting of a frame support member constructed entirely of synthetic resinous material and metal parts cast into said frame support member, said metal parts including a block member having an opening formed therein for supporting the rear end of the barrel, said buffer device being disposed below the barrel in said block member such that the rear face of a forward transverse wall of the breech block runs against the buffer device during the recoil movement of the breech block, the block member being provided with a forwardly opening bore into which a spring system provided with brake rings is inserted and with a buffer member held in position by a screw ring, said buffer member extending through the screw ring.

9. A pistol according to claim 8, wherein a slider member with an abutment is disposed at the forward end of the block member and is movable perpendicularly to the barrel, the recoiling breech block being arranged to impinge on the abutment which can be moved out of the path of the breech block by means of the slider member, whereby the breech block can be displaced beyond its rearmost operative position to such extent that guide grooves provided at the rearward end of the breech block are disengageable from guide projections provided at the frame support member.

10. A pistol according to claim 9, wherein the slider member is disposed above the trigger aperture of the grip member and can be displaced into the trigger aperture out of its operative position in which the lower end of the slider member which is provided with a hammerlike head extending over the whole width of the grip member is flush with the underside of the grip member limiting the trigger aperture.

11. A pistol according to claim 10, wherein the slider member is Iprovided at its rear side with undercut proections w rch engage fittmgly into corresponding recesses at the trigger when the slider member has been displaced from its operative position.

12. A pistol according to claim 11, wherein the slider member is held in its operative position by a detent device which is formed by a resilient detaining member disposed in the block member and a corresponding recess at the inside of the slider member.

13. A pistol according to claim 9, wherein the abutment disposed at the slider member is formed by a plunger which is displaceably mounted in the slider member and the inner end of which rests against the buffer member disposed in the block member.

14. A pistol according to claim 12, wherein the detaining member is disposed in the buffer member and the recess is disposed in the plunger. 

1. A self-loading pistol comprising: a barrel, frame means, and a breech block slidably mounted on said frame means for displacement in the longitudinal direction with respect to said frame means, said frame means consisting of a frame support member constructed entirely of synthetic resinous material and metal parts cast into said frame support member, part of said frame support member forming a pistol hand grip extending downwardly from the rear portion of the pistol; said metal parts including two longitudinally extending wall sections spaced from one another to form part of a trigger box assembly therebetween, said wall sections having lower rims cast into the frame support member at a position adjacent the top part of the hand grip member, a block member joining the respective forward ends of said wall sections, and a transverse crossweb joining the respective rearward ends of said wall sections together, said block member having an opening formed therein for supporting the rear end of the barrel and having a lower portion cast into the frame support member, said frame support member including an upwardly extending section and said crossweb including portions extending transversely beyond the outer surface of the upwardly extending section of the frame support member to form guides for guiding the sliding movement of the breech member.
 2. A self-loading pistol according to claim 1, characterized in that the breech block has a Transverse wall at its front end and longitudinally extending grooves adjacent its rear end, said breech block being guided at its front end by way of said transverse wall cooperating with the barrel and at its rear end by way of said longitudinal grooves cooperating with the guides formed on the crossweb.
 3. A pistol according to claim 1, further comprising a trigger formed by a plate-shaped slide member which is guided at its upper and at its lower edge as well as at its rearward section in corresponding recesses of the frame support member.
 4. A pistol according to claim 3, wherein the trigger is loaded by a coil compression spring which engages in a recess disposed at the rear end of the trigger and is supported on a transverse rail which is inserted behind the trigger in grooves provided at the inside of the frame support member.
 5. A pistol according to claim 4, wherein the trigger is connectible to a trigger assembly mounted in the trigger casing by means of trigger rods which are guided in longitudinal slots of the lateral wall parts of a trigger casing, the forward ends of said trigger rods engaging in recesses of the trigger by means of inwardly and downwardly directed lugs, and the rearward ends of said trigger rods being provided with cranked sections which project into the trigger casing.
 6. A pistol according to claim 1, wherein a buffer device is provided onto which the breech block runs at the end of its recoil movement.
 7. A pistol according to claim 6, wherein the buffer device is disposed below the barrel and located in the block member receiving the barrel, and wherein the rear face of a forward transverse wall of the breech block runs against the buffer device during the recoil movement of the breech block.
 8. A self-loading pistol comprising a barrel, frame means, a breech block slidably mounted on said frame means for displacement in the longitudinal direction with respect to said frame means, and a buffer device for buffering the recoil movement of the breech block, said frame means consisting of a frame support member constructed entirely of synthetic resinous material and metal parts cast into said frame support member, said metal parts including a block member having an opening formed therein for supporting the rear end of the barrel, said buffer device being disposed below the barrel in said block member such that the rear face of a forward transverse wall of the breech block runs against the buffer device during the recoil movement of the breech block, the block member being provided with a forwardly opening bore into which a spring system provided with brake rings is inserted and with a buffer member held in position by a screw ring, said buffer member extending through the screw ring.
 9. A pistol according to claim 8, wherein a slider member with an abutment is disposed at the forward end of the block member and is movable perpendicularly to the barrel, the recoiling breech block being arranged to impinge on the abutment which can be moved out of the path of the breech block by means of the slider member, whereby the breech block can be displaced beyond its rearmost operative position to such extent that guide grooves provided at the rearward end of the breech block are disengageable from guide projections provided at the frame support member.
 10. A pistol according to claim 9, wherein the slider member is disposed above the trigger aperture of the grip member and can be displaced into the trigger aperture out of its operative position in which the lower end of the slider member which is provided with a hammer-like head extending over the whole width of the grip member is flush with the underside of the grip member limiting the trigger aperture.
 11. A pistol according to claim 10, wherein the slider member is provided at its rear side with undercut projections which engage fittingly into corresponding recesses at the trigger when the slider member has been displaced from its operative position.
 12. A pistol accordIng to claim 11, wherein the slider member is held in its operative position by a detent device which is formed by a resilient detaining member disposed in the block member and a corresponding recess at the inside of the slider member.
 13. A pistol according to claim 9, wherein the abutment disposed at the slider member is formed by a plunger which is displaceably mounted in the slider member and the inner end of which rests against the buffer member disposed in the block member.
 14. A pistol according to claim 12, wherein the detaining member is disposed in the buffer member and the recess is disposed in the plunger. 